diff --git a/src/plugins/view/citationtreeview.py b/src/plugins/view/citationtreeview.py
index 780391f5d..f66d92e1e 100644
--- a/src/plugins/view/citationtreeview.py
+++ b/src/plugins/view/citationtreeview.py
@@ -366,6 +366,7 @@ class CitationTreeView(ListView):
+